Common Core: 1st Grade Math : Representing and Solving Addition and Subtraction Problems

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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Example Questions

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例子问题# 21:Representing And Solving Addition And Subtraction Problems

Joe spentminutes cleaning his room,minutes cleaning his bathroom, andminutes helping his mom clean the kitchen. How much time did Joe spend cleaning?

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many total minutes Joe spent cleaning altogether. When we put things together we are adding.

We can start atand count up.

Then we can count up.

Example Question #22 :Representing And Solving Addition And Subtraction Problems

At school we had a hotdog-eating contest. I atehotdogs, Mel atehotdogs, and Eric atehotdogs. How many total hotdogs did we eat?

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many hotdogs we ate altogether. When we put things together we are adding.

We can start atand count up.

Then we can count up.

Example Question #23 :Representing And Solving Addition And Subtraction Problems

At the cakewalk there arechocolate cakes,yellow cakes, andwhite cakes. How many total cakes are there?

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many cakes are at the cake walk altogether. When we put things together we are adding.

We can start atand count up.

Then we can count up.

例子问题# 21:Word Problems: Addition Of Three Whole Numbers Whose Sum Is 20 Or Less: Ccss.Math.Content.1.Oa.A.2

At Linda’s birthday party there werepeperoni pizzas,sausage pizzas, andcheese pizzas. How many total pizzas were there?

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many total pizzas we have when we put the pizzas altogether. When we put things together we are adding.

We can start atand count up.

Then we can count up.

Example Question #25 :Representing And Solving Addition And Subtraction Problems

Lauren haspencils,markers, andnotebooks in her backpack. How many total items does Lauren have in her backpack?

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many total supplies Lauren has in her backpack when we put everything together. When we put things together we are adding.

We can start atand count up.

Then we can count up.

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